Image display apparatus and image adjusting method

Active Publication Date: 2007-03-01
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] An advantage of some aspects of the invention is to provide an image display apparatus capable of easily performi

Problems solved by technology

In the related art, when the image adjusting is performed by an image display apparatus, a small number of predetermined selection items are selected, so that the adjusting is not smoothly performed.
If the number of adjusting items may be increased in order to implement the smooth image adjusting, a change of the image involved with the image adjusting is not easy to perceive in advance.
In addition, it is difficult to determine which adjusting items are selected to perform desired image adjusting.
When a portion of the screen is visualized by the blinking of the image

Method used

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  • Image display apparatus and image adjusting method
  • Image display apparatus and image adjusting method

Examples

Experimental program
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Example

MODIFIED EXAMPLE 1

[0418] Modified Example 1 is described with reference to FIG. 2. In the aforementioned embodiments, the selection of the image portion or the adjusting of the output grayscale value in the cursor selection mode is performed by using the “up” and “down” buttons or the “left” and “right” buttons of the manipulator 1 or the remote controller 2. However, the invention is not limited thereto. For example, a track ball as a pointing device is provided to the remote controller 2, and a device driver corresponding to the track ball is stored in the storage unit 14. By manipulating the track ball, the selection of the image portion or the adjusting operation for the output grayscale value may be performed.

[0419] In such a construction of the projector 100, the adjusting manipulation can be efficiently performed.

Example

[0420] Modified Example 2 is described with reference to FIG. 2. In the aforementioned embodiments and the modified example, the “grayscale point adjusting” and the “γ correction” is performed by using the Y signal among the YUV signals. However, the invention is not limited thereto.

[0421] For example, a luminescence table which is used to apply luminescence date for each of the color signals based on the pixel data for RGB signals is provided in the storage unit 14, and the “grayscale point adjusting” and the “γ correction” may be performed by using the luminescence data for the RGB signals.

[0422] In such a construction, advantages same as those of the aforementioned embodiments and modified example can be obtained.

Example

[0423] Modified Example 3 is described with reference to FIG. 2. In the aforementioned embodiments and the modified examples, the projector 100 is exemplified as a three-plate type liquid crystal projector using three plates of the liquid crystal light valves 5R, 5G, and 5B as optical modulation devices. The invention is not limited thereto.

[0424] For example, the projector may be a single-plate type liquid crystal light valve which is constructed by regularly disposing red, green, and blue color filters in a lattice shape and extracting modulated light having a full color with a single plate. In addition, the projector may be constructed with a reflective liquid crystal display apparatus or a tilt mirror device. In addition, the projector may be a rear type projector having such an optical modulation device and the screen.

[0425] In such a construction, advantages same as those of the aforementioned embodiments and modified example can be obtained.

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Abstract

An image display apparatus includes: an image signal processing unit which adjusts an input grayscale values included in an input image signal according to a predetermined grayscale characteristic; a display unit which displays an image based on an image signal included in an output grayscale value adjusted by the image signal processing unit; and a grayscale characteristic changing unit which changes a correlation between the input and output grayscale values defined based on the grayscale characteristic.

Description

BACKGROUND [0001] 1. Technical Field [0002] The present invention relates to an image display apparatus for displaying an image represented by an image signal and an image adjusting method for the image display apparatus. [0003] 2. Related Art [0004] In the related art, an image display apparatus capable of adjusting an image represented by an image signal according to contents of the image or projection environment has been proposed. For example, in a projector disclosed in JP-A-2005-99620, three types of selection items “dynamic”, “natural”, and “soft” are provided, and γ values corresponding to the adjusting items are stored. The projector sets the γ value according to selected adjusting items and performs grayscale adjusting (hereinafter, referred to a “γ correction”) on the image signal. [0005] In the related art, when the image adjusting is performed by an image display apparatus, a small number of predetermined selection items are selected, so that the adjusting is not smooth...

Claims

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Application Information

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IPC IPC(8): G09G3/36H04N5/445
CPCG09G3/002H04N21/4854G09G2320/0242G09G2320/0673H04N5/202H04N5/44513H04N5/57H04N5/74H04N9/3182H04N9/3191H04N9/3197H04N2005/745G09G5/04H04N21/4122H04N21/4318G09G3/006H04N21/47H04N9/69
Inventor SAKAKIBARA, TAKEFUMIMOCHIZUKI, YUJIKUMAMOTO, OSAMUFURUI, SHIKI
Owner SEIKO EPSON CORP
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